Process for making and laying concrete pipe



- T. DE LA MARE PROCESS FOR MAKING AND LAYING CONCRETE iIPE Filed on. 2, 1923' 2 Sheets-Sheet 1 r ATTORNEY.

Aug. 11, 1925. 1,549,406

T. DE LA MARE PROCESS FOR MAKING AND LAYING CONCRETE PIPE Filed Oct. 2, 1925 2 Sheets-Sheet 2 INVENTOR.

ATTORNEY.

Patented Aug. 11, 1925 UNITED STATES PATENT orrice',

THOMAS DE LA MARE, OF TOOELE, UTAH.

PROCESS FOR MAKING AND LAYING QONCRE'IE lIPE'.

Application filed October 2, 1923. Serial No. 6,214.

To all whom it may concern:

Beit known that I, THOMAS Br. LA MARE,

a citizen of the United States, residing at 'Iooele, in the county of Tooele and State of Utah, have invented certain new and useful Improvements in Processes for Making and Laying Concrete Pipe, of which the follow-' ing is a specification. I

My invention relates to methods for making concrete pipe, and has for its object to provide an economical method of making when laid in continuous length. Figure 2.

is a transverse section of the pipe shown in Figure 1 or a reenforcedconcrete pipe to be laid in a continuous length. Figure 3 is an elevation partly in longltudinal section of. a continuous pipe made and cured in a trench.

Figure 4 is a longitudinal section of a joint between sections of previouslyconstiructed concrete pipe. Figure 5 ,is a transverse section on line 55 of Figure 4. Figure 6 is a pair of opposed annular washers coated withasphalt. Figure -7 is a side elevation of one of the said washers.

In making and laying concrete pipe through which water or other liquid under pressure is to be carried, it is necessary that the pipe shall be reenforced and so constructed that it will allow contraction and expansion, both longitudinall and circumferentially, due to change 0 temperature, and to allow for contraction when the concrete is setting, and also that the. pipe be lined throughout with an impervious lining which is elastic and pliant. Thepresent invention contemplates that pipe made in accordance-herewith will be more frequently laid in a trench and under cover;-however,

I do not confine myself to such use alone.

My method of making and laying such pipe consists of the use of a lining A, preferably made of sheet metal or other impervious sheet material, having a lap joint, shown at l, and made up of sections 2', preferably about five feet in length, and joined together by slipping a portion of one sectioh within another contiguous section, as the common stove pipe. Before the said lining is laid, it is covered both inside and outside with coating of hotv asphaltum by dipping said sections 2 of lining pipe A inhot plastic asphaltum or similar material. At about every ten or fifteen feet an asphalt coated sleeve member B, made of similar material to that of said lining A, is used at the meeting ends of two sections 2. Two opposed collar washers C, made of sheet metal and slightly conical and likewise dipped in hot asphaltum, are used as a form surrounding said lining pipe A and spaced apart by the asphaltum coating to. allow lougitudinal contraction of the concrete when it is placed around the pipe A. The said members 2 are spaced apart on said sleeve member B, preferablyabout one quarterof an inch to. allow for longitudinal expansion, as shown at 3, and the said metal collar band washers C are spaced apart and provided 1..

with the asphalt coating between opposed pairs thereof, by which leaksdue to longitudinal contraction are prevented. When the pipe is to be made and-laid in a trench at other than horizontal, I preferably start at the lower end and lay the-lining .pipe

and, as well, the cement concrete pipe P upthe hill or incline, and to economize in cement I use a plurality of side forms D, one

on each sideof, and spaced from, the said lining pipe A, with ends abutting, and thesaid lining pipeA is spaced above the bottom of the trench, in order that a concrete receiving space will be provided surrounding said lining pipe A. I place medially in 1 sa d space a reenforcing member made of coarse meshed screen wire E, and then pour -the concrete into said space both inside and outside of said reenforcement member, so that the wire will be imbedded within the concrete portionof my pipe. The sides of said wire screen are overlapped at the upper side and covered with the concrete. When the pipe P is set the side forms D may be removed from the trench, and the trench completely filled up with soil. that said completedpipe ma be easily tapped for connectin laterals t ereto, I insert short gas pipet 'imbles F at intervals radially in the sides of said lining pipe A,

In order with portions of said thimbles extended outcumferentially in said erals connected therewith,

wardly through the concrete pi v P, and if desired a plug 6 may be screwe in the free or outer end of each of said thimbles F to be replaced with the end of the lateral ipe as desired. After the initial setting of t e con.- crete, water not under pressure may be supplied in said ipe for keeping tern eratures even and on t e outside for proper y curin or setting the concrete. By thuslaying an curing my pi 'e I am able to cure the pipe and back fill t e trench, and test for possible leaks much quicker than has heretofore been done. To ex 'te the construction of my pipe I may divide the work between diiierent crews of workers and when one crew has reached the end of another crews work, by inserting one of the said pipe sections A in themeeting ends of the two sections of the linin wire the pipe P may be portion of the wor and'pipe made continuous.

if I desire to lay previously prepared pi having my lining p1 A therein I join t e different sections at t e joint shownin Figure 4:, by inserting sleeve G at the meeting or adjacent ends of the ipes A after it has been dipped in hot asp altum in said previously prepared concrete-pipe, and surroundin the joint with hot asphaltum which is he d in place by a band H.

B thus providing an' elastic, liant coating within and withogt the ining ipe, and slip joints both longitudinally anfcirining pipe, which allows contraction and expansion thereof, and in the concrete portion of my pipe, "together with a reenforced concrete outer pipe that is freeto contract or expand circumferentially and longitudinally without injury to it or to the linin pipe or to lathave overcome the difliculties in making and laying an economical continuous, pressure-resisting concrete pipe.

Having thus described my method for making and laying continuous concrete pipe,

pipe A, then with the reenforcing in place, the concrete which forms I desire to secure by Letters Patent and claim 1. A method of making and laying con- I crate pipe, which consists of coatin short; sections-of metal lining pipe with ot asphalt, and telescoping about two inches of one section within another section which has been'similarly coated on both the inside and outside, and continuing said joining of said ured, as at any other.

menace short sections of lining pipe until another portion of previously joined, coated and laid pipe is reached then joining said two portions of pipe by slipping an asphaltum coated thimble made of sheet metal into the adjacent ends of said two portions, and surrounding said metal lining pipe with coarse meshed wire screening, and then covering said pipe and screening with plastic concrete suficiently to imbed and cover the said screening.

2. A process for making and laying a continuous reenforoed concrete pipe which con sists of partially telescoping sections of metal pipe; coating both the inside and outside of said pipe with-hot asphalt before joining them; goining said coated and joined metal pipe wit a previously laid metal pipe by placing on each of said pipes a sheet metal washer havin a frusto-conical form with their bases adjacent; then sli ping a thimble of sheet metalpipe which as ust been covered with hot asphalt into the end portions of both pipes progressively and.

pipes contiguous the oint and said washers with hot asphalt and retainmglthe concrete and asphalt in place until eac has set.

3. A process for makingsand laying continuous reenforced concrete 1pc, which consists of partially telescoping sections of sheet lining pipe; coating both the inside and outside of said lining pipe with hot asphalt before 'oining them; surrounding sald coated an joined pipe with coarse meshed wire screening; joining said coated, screened and telescoped section of pipe with another portion of the contem lated continuous pipe having a similar g pipe protruding therefrom by placing around the two adjacent sections of both lining pipes two conical sheet metal washers, one on each pipe and with their bases adjacent; then slip mg a sheet metal thimble which has just Eeencoated with hot asphalt into each pipe overlapping the joint progressively and. retr ively; and then surrounding said limng pipe with plastic concrete except at the joint and covering the auction rtion and the said washers with otas'pha t and avoid use until both the concrete and asphalt have set.

In testimony whereof I have aflixed my signature. r v

- THOMAS DE LA 

